code: def formatdate(timeval=None, localtime=False, usegmt=False):
      """Returns a date string as specified by RFC 2822, e.g.:
  
      Fri, 09 Nov 2001 01:08:47 -0000
  
      Optional timeval if given is a floating point time value as accepted by
      gmtime() and localtime(), otherwise the current time is used.
  
      Optional localtime is a flag that when True, interprets timeval, and
      returns a date relative to the local timezone instead of UTC, properly
      taking daylight savings time into account.
  
      Optional argument usegmt means that the timezone is written out as
      an ascii string, not numeric one (so "GMT" instead of "+0000"). This
      is needed for HTTP, and is only used when localtime==False.
      """
      # Note: we cannot use strftime() because that honors the locale and RFC
      # 2822 requires that day and month names be the English abbreviations.
      if timeval is None:
          timeval = time.time()
      if localtime:
          now = time.localtime(timeval)
          # Calculate timezone offset, based on whether the local zone has
          # daylight savings time, and whether DST is in effect.
          if time.daylight and now[-1]:
              offset = time.altzone
          else:
              offset = time.timezone
          hours, minutes = divmod(abs(offset), 3600)
          # Remember offset is in seconds west of UTC, but the timezone is in
          # minutes east of UTC, so the signs differ.
          if offset > 0:
              sign = "-"
          else:
              sign = "+"
          zone = "%s%02d%02d" % (sign, hours, minutes // 60)
      else:
          now = time.gmtime(timeval)
          # Timezone offset is always -0000
          if usegmt:
              zone = "GMT"
          else:
              zone = "-0000"
      return "%s, %02d %s %04d %02d:%02d:%02d %s" % (
          ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"][now[6]],
          now[2],
          [
              "Jan",
              "Feb",
              "Mar",
              "Apr",
              "May",
              "Jun",
              "Jul",
              "Aug",
              "Sep",
              "Oct",
              "Nov",
              "Dec",
          ][now[1] - 1],
          now[0],
          now[3],
          now[4],
          now[5],
          zone,
      )
  
imports: import os
  import re
  import time
  import base64
  import random
  import socket
  import urllib
  import warnings
  from email._parseaddr import quote
  from email._parseaddr import AddressList
  from email._parseaddr import mktime_tz
  from email._parseaddr import parsedate
  from email._parseaddr import parsedate_tz
  from quopri import decodestring
  from email.encoders import _bencode, _qencode
label_desc: Use image node_id 6 for calling a global function with example usage: formatdate(timeval, localtime, usegmt) and returns: unknown